when an Editor creates a Post, the URL slug should always be determined by the Page Type (Story/Press/Publication).

I spotted a Press Release on Production with the URL greenpeace.org/international*/issues/ships/*  so I did some investigating and discovered an odd behaviour that occurs only with Ships

whenever the Editor selects Ships as the Issue, the URL is set as /international*/issues/ships/* this does not happen if the Editor selects any of the other Issue Categories (Nature/People/Energy).

a separate but related issue:
even if a Post has already been published as greenpeace.org/international/press and the editor goes back and adds Ships later, the URL is changed from /press to /issues/ships/

another separate but likely related issue:
the URL also gets revised if the Editor changes the Page Type from e.g Story to Press the URL changes from /international/story to /international/press

if a post URL changes from one type to another b/c the Editor made an error this is not a big deal so long as the existing URL continues to work - if the old one breaks when a Page Type Category changes, that's a problem we need to address.